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  2. Formula One tyres - Wikipedia

    en.wikipedia.org/wiki/Formula_One_tyres

    As Formula One wheel rim diameter size will switch from 13 to 18 in (330 to 457 mm), the tyre diameter of 2022-spec Pirelli Formula One tyres will also be altered, from 670 to 720 mm (26.4 to 28.3 in), while the tread width of 2022-spec Pirelli Formula One tyres are expected to be unchanged.

  3. Uniform Tire Quality Grading - Wikipedia

    en.wikipedia.org/wiki/Uniform_Tire_Quality_Grading

    These represent the tire's resistance to the generation of heat at speed. Tires graded A effectively dissipate heat up to a maximum speed that is greater than 115 mph. B rates at a maximum between 100 mph and 115 mph. C rates at a maximum of between 85 mph to 100 mph. Tires that cannot grade up to C or higher cannot be sold in the US. [9]

  4. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    TWI: Tread wear indicator – a device, such as a triangle or a small Michelin Man icon, located where the tread meets the sidewall, and indicating the location of the raised wear bars in the tire tread channels – TWI is also used to refer to the raised wear bars themselves. VSB: Vertical serrated band; WSW: White sidewall

  5. Pirelli Cinturato - Wikipedia

    en.wikipedia.org/wiki/Pirelli_Cinturato

    Pirelli were hot on the tail with their new CN36 which came out in 1969. The CN36 had a striking tread pattern and was a favourite for the likes of the Porsche 911, Ford Escort & Ford Cortina. 1971 would see Pirelli’s introduction of another high speed (HS) tyre with their CN12 Cinturato HS. These tyres were rated to be able to withstand the ...

  6. Tire tread - Wikipedia

    en.wikipedia.org/wiki/Tire_tread

    As tires are used, the tread is worn off, limiting its effectiveness in providing traction. A worn tire can often be retreaded. The word tread is often used casually to refer to the pattern of grooves molded into the rubber, but those grooves are correctly called the tread pattern, or simply the pattern. The grooves are not the tread, they are ...

  7. Tire uniformity - Wikipedia

    en.wikipedia.org/wiki/Tire_uniformity

    Tire forces are divided into three axes: radial, lateral, and tangential (or fore-aft). The radial axis runs from the tire center toward the tread, and is the vertical axis running from the roadway through the tire center toward the vehicle. This axis supports the vehicle's weight. The lateral axis runs sideways across the tread.